FBI agent in charge of Chicago office to depart

"With U.S. Attorney appointee Zach Fardon still to be confirmed by the Senate, Nelson's surprise announcement would leave Chicago's two top federal positions unfilled by permanent employees," the Sun-Times writes.

Mr. Nelson has "held a remarkably low public profile since arriving in Chicago — even by FBI standards," the paper notes. He'd come on board after longtime Chicago chief Robert D. Grant retired last year to take a job with the Walt Disney Company in Los Angeles, as part of their "Global Security Team."